Hah I did that last time but, then they paid afterwards (amusingly literally hours before I could have claimed back the fees) and then asked for a refund which apparently is well within their rights.
I got the fees back eventually by calling ebay but I think they managed to avoid the strike that way which was pretty clever in fairness. So I figured this time I’d try and ascertain that they genuinely don’t want the item and have them cancel which means I don’t have to wait four days to claim back the fees.